因此，很少发现有化学残留物。

So chemical residues are rarely found.

youdao

本指南只适用于化学残留物的设备清洗。

This guide is intended to cover equipment cleaning for chemical residues only.

youdao

因而，鱼类和贝类由于“生物积聚”积累了极高水平的毒素和化学残留物在鱼肉中。

Consequently, fish and shellfish can accumulate extremely high levels of toxins and chemical residues in their flesh due to "bio-accumulation".

youdao